package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @author Elora
 * @date 2025/7/9
 **/
@Slf4j
@Service
@Transactional
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    private Orders orders;

    @Autowired
    private WebSocketServer webSocketServer;

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理各种业务异常——购物车为空
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if (shoppingCartList == null || shoppingCartList.isEmpty()){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //地址簿为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收获地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        //向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());
        orders.setUserId(userId);
        this.orders = orders;

        orderMapper.insert(orders);

        //向订单明细表插入n条数据
        List<OrderDetail> OrderDetailList = new ArrayList<>();

        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细对应的订单Id
            OrderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(OrderDetailList);

        //清空该用户购物车
        shoppingCartMapper.deleteByUserId(userId);

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
/*        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }
*/
        //直接给jsonObject设置值
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

       //直接修改数据库的订单状态
        Integer OrderPaidStatus = Orders.PAID;//支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单
        LocalDateTime check_out_time = LocalDateTime.now();//更新支付时间
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, this.orders.getId());

        //使用WebSocket向商家浏览器推送来单提醒 type orderId content
        Map map = new HashMap();
        map.put("type", 1);//Type = 1表示来单提醒，2表示客户催单
        map.put("id", this.orders.getId());
        map.put("content", "订单号" + this.orders.getNumber());

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);

        return vo;


    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }


    /**
     * 用户分页查询订单
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQueryForUser(int page, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(page, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> pageResult = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();
        //查询出订单明细，封装入OrderVO进行响应
        if (pageResult != null && pageResult.getTotal() > 0){
            for (Orders orders : pageResult){
                //查询订单详情数据
                Long ordersId = orders.getId();
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(ordersId);

                OrderVO orderVO = new OrderVO();
                orderVO.setOrderDetailList(orderDetails);
                BeanUtils.copyProperties(orders, orderVO);

                list.add(orderVO);
            }

        }
        return new PageResult(pageResult.getTotal(), list);
    }


    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        List list = orderDetailMapper.getByOrderId(id);

        OrderVO orderVO = new OrderVO();
        orderVO.setOrderDetailList(list);
        BeanUtils.copyProperties(orders, orderVO);

        return orderVO;
    }


    /**
     * 用户取消订单
     * @param id
     */
    @Override
    public void userCancelByid(Long id) {
        //根据id查询该订单
        Orders orders = orderMapper.getById(id);

        //检查订单是否存在
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
            //判断订单状态 status: 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消 7退款
            /*
            待支付和待接单状态下，用户可直接取消订单
            商家已接单状态下，用户取消订单需电话沟通商家
            派送中状态下，用户取消订单需电话沟通商家
            如果在待接单状态下取消订单，需要给用户退款
            取消订单后需要将订单状态修改为“已取消”
            */
        if(orders.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders newOrders = new Orders();
        newOrders.setId(orders.getId());

        //如果订单处于待接单状态，需要进行退款。
        if(orders.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            newOrders.setPayStatus(Orders.REFUND);
        }

        //然后修改订单状态；若订单处于待支付状态则可以直接修改订单状态
        newOrders.setStatus(Orders.CANCELLED);
        newOrders.setCancelReason("用户取消");
        newOrders.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrders);
    }

    @Override
    public void repetitaion(Long id) {
        //根据订单id获取当前订单的菜品信息集合
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        //流式操作将菜品对象数据转为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetails.stream()
                .map(x ->{
            ShoppingCart shoppingCart = new ShoppingCart();
            //第三个参数表示复制时要排除的属性
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        })
                .collect(Collectors.toList());

        //批量插入购物车
        shoppingCartMapper.insertBatch(shoppingCartList);
    }


    /**
     * 商家端分页条件查询订单
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //部分订单需要额外返回订单菜品信息，将Orders转为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //需要返回订单的菜品信息，将订单数据放入OrderVO中并添加菜品信息，再返回。
        List<Orders> ordersList = page.getResult();

        List<OrderVO> orderVOList = new ArrayList<>();
        if (!CollectionUtils.isEmpty(ordersList)) {
            orderVOList = ordersList.stream().map(
                    x -> {
                        OrderVO orderVO = new OrderVO();
                        BeanUtils.copyProperties(x, orderVO);
                        String orderDishes = getOrderDishesStr(x);

                        //将订单菜品信息封装到OrderVO中
                        orderVO.setOrderDishes(orderDishes);
                        return orderVO;
                    }
            ).collect(Collectors.toList());
        }
        return orderVOList;
    }

    private String getOrderDishesStr(Orders orders){
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将每一条订单信息拼接为字符串形式（如：宫保鸡丁*3）
        List<String> orderDishesList = orderDetailList.stream().map(
                x -> {
                    String orderDishes = x.getName() + "*" + x.getNumber() + ";";
                    return orderDishes;
                }
        )
                .collect(Collectors.toList());

        return String.join("",orderDishesList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        //根据状态，分别查询出待接单，待派送，派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //将订单数量封装进VO对象并返回
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 商家接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //商家接单其实就是将订单的状态修改为“已接单”
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        /*
        商家拒单其实就是将订单状态修改为“已取消”
        只有订单处于“待接单”状态时可以执行拒单操作
        商家拒单时需要指定拒单原因
        商家拒单时，如果用户已经完成了支付，需要为用户退款
        */

        //1.根据订单id查询该订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
        //2. 确保订单存在且状态为“待接单”
        if(orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //3. 若用户已支付，需要给用户退款
        if (orders.getPayStatus().equals(Orders.PAID)){
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    orders.getNumber(),
//                    orders.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
            log.info("申请退款：",orders.getAmount(),"元");
        }
        //4. 根据订单id更新订单状态、拒单原因、取消时间
        Orders newOrder = Orders.builder()
                        .id(orders.getId())
                                .status(Orders.CANCELLED)
                                        .rejectionReason(ordersRejectionDTO.getRejectionReason())
                                                .cancelTime(LocalDateTime.now())
                                                        .build();
        orderMapper.update(newOrder);
    }


    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        /*
        派送订单其实就是将订单状态修改为“派送中”
        只有状态为“待派送”的订单可以执行派送订单操作
         */
        //1. 根据订单id查询当前订单
        Orders orders = orderMapper.getById(id);
        //2. 检查当前订单是否存在，状态是否为待派送
        if(orders == null || !orders.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //3. 修改订单状态为派送中
        Orders newOrder = Orders.builder()
                .id(orders.getId())
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();

        orderMapper.update(newOrder);
    }


    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        /*
        完成订单其实就是将订单状态修改为“已完成”
        只有状态为“派送中”的订单可以执行订单完成操作
         */
        //1. 根据订单id获取当前订单
        Orders orders = orderMapper.getById(id);
        //2. 检查当前订单是否存在、状态是否是派送中
        if(orders == null || !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //3. 修改订单状态
        Orders newOrders = Orders.builder()
                .id(orders.getId())
                .status(Orders.COMPLETED)
                .build();
        orderMapper.update(newOrders);
    }


    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        /*
        取消订单其实就是将订单状态修改为“已取消”
        商家取消订单时需要指定取消原因
        商家取消订单时，如果用户已经完成了支付，需要为用户退款
         */

        //1.根据订单id查询该订单
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());
        //2. 确保订单存在
        if(orders == null ){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //3. 若用户已支付，需要给用户退款
        if (orders.getPayStatus().equals(Orders.PAID)){
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    orders.getNumber(),
//                    orders.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
            log.info("申请退款：",orders.getAmount(),"元");
        }
        //4. 根据订单id更新订单状态、拒单原因、取消时间
        Orders newOrder = Orders.builder()
                .id(orders.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(newOrder);
    }


    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }


    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        //1. 根据订单id查询当前订单
        Orders orders = orderMapper.getById(id);
        //2. 检查当前订单是否存在
        if(orders == null ){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map = new HashMap();
        map.put("type", 2);//type = 1表示来单提醒，2表示客户催单
        map.put("id", id);
        map.put("content", orders.getNumber());

        //通过websocket向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
